|Usenet groups within alt.propeller-head from giganews.com|
Usenet newsgroups within "alt.propeller-head", contributed courtesy of giganews.com. These captures omit most binary posts.
Keywords: alt.propeller-head; alt.propeller-head.frogbut
|The screw propeller: and other competing instruments for marine propulsion - Seaton, A. E. (Albert Edward), 1848-1930|
Book digitized by Google from the library of the University of California and uploaded to the Internet Archive by user tpb.
Keywords: Screw propeller; Ship propulsion
|Stellar Propeller Track Two - Nick Urquhart|
Untitled song for an untitled band. No vox.
Keywords: experimental guitar untitled stellar propeller
|DE-ICING EFFECTIVENESS OF EXTERNAL ELECTRIC HEATERS FOR PROPELLER BLADES - Lewis, J. P|
No Abstract Available
Keywords: AERONAUTICS; DEICERS; DEICING; HEATERS; PROPELLER BLADES
|The Meteoritic Component in Impact Deposits - Kyte, Frank T|
This proposal requested support for a broad-based research program designed to understand the chemical and mineralogical record of accretion of extraterrestrial matter to the Earth. The primary goal of this research is to study the accretion history of the Earth, to understand how this accretion history reflects the long-term flux of comets, asteroids, and dust in the inner solar system and how this flux is related to the geological and biological history of the Earth...
Keywords: ALTITUDE; DATA REDUCTION; PROPELLER SLIPSTREAMS; PROPELLER EFFICIENCY; WIND TUNNEL TESTS; HELICOPTER PERFORMANCE; PROPELLER BLADES; AIRCRAFT ENGINES; FREE FLOW; MACH NUMBER; THRUST LOADS
|Ron's Theory - Propellerheads|
Keywords: propellerheads; propeller; heads; propellor; dub; electro; techno; funk
|Spacecraft attitude pointing performance during orbit adjust as a function of compensator order - Basuthakur, S.|
A steady state compensator of specified order is proposed to estimate the required duty cycle needed to balance the distribution torque. The compensator was increased gradually to demonstrate the improvement in pointing accuracy. The basic mathematical model of the flexible spacecraft and sensor used to characterize the performance of the compensator are described.
Keywords: AERODYNAMIC CHARACTERISTICS; PERFORMANCE TESTS; PROPELLER EFFICIENCY; PROPELLER SLIPSTREAMS; GENERAL AVIATION AIRCRAFT; HOT-WIRE ANEMOMETERS; NOISE REDUCTION; SCALE MODELS
|Investigation of icing characteristics of typical light-airplane engine induction systems - Coles, Willard|
No Abstract Available
Keywords: AIRFOILS - NACA 16 SERIES - CHAR , A C , MOMENTS & ORDINATES PROPELLER; AIRFOILS - NACA 16-009 - CHAR , MOMENTS & ORDINATES PROPELLER; AIRFOILS - NACA 16-106 - CHAR , MOMENTS & ORDINATES PROPELLER; AIRFOILS - NACA 16-109 - CHAR , MOMENTS & ORDINATES PROPELLER; AIRFOILS - NACA 16-115 - CHAR , MOMENTS & ORDINATES PROPELLER
|Load distributions due to steady roll and pitch for thin wings at supersonic speeds - Moeckel, W E|
No Abstract Available
Keywords: ICE PREVENTION - PROPELLERS; PROPELLERS - EFFICIENCY; ICE PREVENTION - AIR HEATING; PROPELLERS - CURTISS; AIRFOILS - NACA 16-SERIES - PROPELLER; PROPELLER TIPS; AIR FLOW - PROPELLERS
|PROPELLER SLIPSTREAM EFFECTS AS DETERMINED FROM WING PRESSURE DISTRIBUTION OF A LARGE-SCALE SIX-PROPELLER VTOL MODEL AT STATIC THRUST - Huston, R. J.|
Propeller slipstream effects as determined from wing pressure distribution of a large-scale six-propeller vtol model at static thrust
Keywords: ANGLE OF ATTACK; STATIC THRUST; VTOL AIRCRAFT; WING; PRESSURE DISTRIBUTION; PROPELLER SLIPSTREAMS; STATIC THRUST; VERTICAL TAKEOFF AIRCRAFT; WINGS; PRESSURE DISTRIBUTION; PROPELLER; SLIPSTREAM
|Aerodynamic data on large semispan tilting wing with 0.6-diameter chord, single slotted flap, and single propeller rotating up at tip - Fink, M. P.|
Aerodynamics of tilt-wing propeller driven v/stol configuration
Keywords: AERODYNAMIC CHARACTERISTICS; WINGS; AERODYNAMIC CHARACTERISTICS; PROPELLER DRIVE; TILT-WING AIRCRAFT; V/STOL AIRCRAFT; AERODYNAMICS; ATTITUDE (INCLINATION); FLAPPING; PROPELLER DRIVE; PROPELLERS; ROTATION; TILT WING AIRCRAFT; V/STOL AIRCRAFT
|A Generalized Multi-Phase Framework for Modeling Cavitation in Cryogenic Fluids - Hosangadi, Ashvin|
A generalized multi-phase formulation for cavitation in fluids operating at temperatures elevated relative to their critical temperatures is presented. The thermal effects and the accompanying property variations due to phase change are modeled rigorously. Thermal equilibrium is assumed and fluid thermodynamic properties are specified along the saturation line using the NIST-12 databank. Fundamental changes in the physical characteristics of the cavity when thermal effects become pronounced are ...
Keywords: WIND TUNNEL TESTS; MACH NUMBER; BLADE TIPS; PROPELLER EFFICIENCY; PROPELLERS; THRUST LOADS; LOAD DISTRIBUTION (FORCES); PROPELLER BLADES; COEFFICIENTS; SLIPSTREAMS; FREE FLOW
|Wind tunnel tests on airfoil boundary control using a backward opening slot - Knight, Montgomery|
This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil equipped with a backward opening slot. Various slot locations, widths of opening, and pressures, were used. The tests were conducted in the Five-Foot Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. The greatest increase in maximum lift was 96 per cent, the greatest decrease in minimum drag was 27 per cent, and the greatest increase in ...
Keywords: PROPELLER - WIND TUNNEL TESTS; PROPELLERS - CHARACTERISTICS - WIND TUNNEL TESTS; PROPELLERS - DURAND WIND TUNNEL TESTS; AIRFOILS - GOETTINGEN 409-CHAR ,PROPELLER C P & ORDINATES
|Approximate design method for high-solidity blade elements in compressors and turbines - Stanitz, John|
No Abstract Available
Keywords: ICE FORMATION - PROPELLERS; PROPELLERS - EFFICIENCY; THEORIES - PROPELLERS BLADE ELEMENT; HEATING, AERODYNAMIC; AIRFOILS - CLARK Y PROPELLER; AIRFOILS - NACA 0012 PROPELLER; ICE PREVENTION - PROPELLERS
|NASA SCI Files - Flying A Plane - NASA LaRC Office of Education|
NASA Sci Files segment demonstrating how cockpit controls negotiate the forces of flight.
Keywords: Rudder; Elevator; Yoke; Climb; Descent; Gravity; Drag: Thrust; Lift; Engine; Propeller; Synthetic Vision
|Performance of gas-lubricated nonconforming pivoted-pad journal bearings and a flexibly mounted spiral-groove thrust bearing - Ream, L. W|
A test program was conducted to determine the performance characteristics of gas-lubricated nonconforming pivoted-pad journal bearings and a spiral-groove thrust bearing designed for the Brayton cycle rotating unit (BRU). Hydrostatic, hybrid (simultaneously hydrostatic and hydrodynamic), and hydrodynamic tests were conducted in argon gas at ambient pressure and temperature ranges representative of hydrostatic operation up to the 10.5-kWe BRU power-generating level...
Keywords: FLOW CHARACTERISTICS; PROPELLER FANS; ROTOR AERODYNAMICS; TRANSONIC SPEED; EQUIPMENT SPECIFICATIONS; INLET FLOW; PERFORMANCE TESTS; PRESSURE DISTRIBUTION
|An investigation of the section characteristics of plain unsealed ailerons on an NACA 66,1-115 airfoil section in the Langley 8-foot high-speed tunnel - Luoma, Arvo|
No Abstract Available
Keywords: TURBINES, GAS - THERMODYNAMICS; ENGINES, TURBO-PROPELLER; GASES - HEAT, SPECIFIC; THERMAL EFFICIENCY; GASES - EXPANSION - JOULE; GASES - THERMODYNAMICS
|A device for measuring sonic velocity and compressor Mach number - Huber, Paul W|
No Abstract Available
Keywords: ENGINES, COMPOUND; VALVES - OVERLAP; AFTERBURNING; FUEL COMSUMPTION; ENGINES - HORSEPOWER; ENGINES, SUPERCHARGED; ENGINES, TURBO-PROPELLER; MANIFOLDS, EXHAUST
|Advanced manufacturing development of a composite empennage component for L-1011 aircraft - NON|
Work in process verification and tooling development continued. The decision was made to redesign the ribs to a more producible design. The bead was eliminated and the truss ribs changed to plain C sections. The solid web rib stiffeners were eliminated as well as the beads and the webs are now reinforced with a syntactic core. Syntectic is an epoxy containing glass microballoons. Two cover specimens were successfully tested...
Keywords: AERODYNAMIC NOISE; NOISE MEASUREMENT; PROPELLERS; WIND TUNNEL TESTS; DIRECTIVITY; MACH NUMBER; PROPELLER BLADES; TURBOPROP AIRCRAFT
|Optical fibers for the distribution of frequency and timing references - Lutes, G. F|
An optical fiber communications link was installed for the purpose of evaluating the applicability of optical fiber technology to the distribution of frequency and timing reference signals. It incorporated a 1.5km length of optical fiber cable containing two multimode optical fibers. The two fibers were welded together at one end of the cable to attain a path length of 3km. Preliminary measurements made on this link, including Allan variance and power spectral density of phase noise are reported...
Keywords: NOISE MEASUREMENT; PROPELLER FANS; SHROUDED PROPELLERS; WIND TUNNEL TESTS; FAN BLADES; PERFORMANCE TESTS; PRESSURE RATIO
|Determination of neutron spectra in a coupled graphite-heavy water reactor - Casali, F|
Group theory for neutron spectra analysis in coupled graphite-heavy water reactor
Keywords: ANISOTROPY; PROPELLER BLADES; ROTORS; STABILITY; DAMPING; MODULUS OF ELASTICITY; MOMENTS OF INERTIA; OSCILLATIONS
|An approximate spin design criterion for monoplanes, 1 May 1939 - Seidman, O.|
An approximate empirical criterion, based on the projected side area and the mass distribution of the airplane, was formulated. The British results were analyzed and applied to American designs. A simpler design criterion, based solely on the type and the dimensions of the tail, was developed; it is useful in a rapid estimation of whether a new design is likely to comply with the minimum requirements for safety in spinning.
Keywords: LIGHT AIRCRAFT; PROPULSIVE EFFICIENCY; SPIN DYNAMICS; SPIN TESTS; PROPELLER EFFICIENCY; THRUST; TORQUE; WIND TUNNEL TESTS
|Microwave remote sensing of snowpack properties - NON|
Topic concerning remote sensing capabilities for providing reliable snow cover data and measurement of snow water equivalents are discussed. Specific remote sensing technqiues discussed include those in the microwave region of the electromagnetic spectrum.
Keywords: NACELLES; PRESSURE DISTRIBUTION; PROPELLER FANS; SLIPSTREAMS; SUPERCRITICAL WINGS; DRAG; FATIGUE LIFE; LEADING EDGES
|Hypersonic Aircraft Technology Conference. Program and slides - NON|
No Abstract Available
Keywords: AIRCRAFT FUELS; FUEL CONSUMPTION; PROPELLER BLADES; COMPOSITE MATERIALS; COST ANALYSIS; DESIGN ANALYSIS; ENGINE NOISE; WEIGHT REDUCTION
|Building Sophisticated Robots with ViewPort and the Parallax Propeller - HomeBrew Robotics Club|
Hanno Sander talks to the club about the Parallax Propeller's multicore architecture, which let's you develop sophisticated robots by combining existing code. Combined with ViewPort (a full featured debugging environment) you'll be building sophisticated projects in no time! ViewPort comes with an integated spin code debugger, OpenCV vision engine, fuzzy logic engine, high speed logic analyzer and oscilloscope, and the ability to monitor and change variables in a running program...
Keywords: HomeBrew Robotics Club; Robots; Robotics; Electronics; Parallax; Propeller; Microprocessor; ViewPort; OpenCV; DanceBot
|Propulsion Health Monitoring for Enhanced Safety - Butz, Mark G.|
This report presents the results of the NASA contract Propulsion System Health Management for Enhanced Safety performed by General Electric Aircraft Engines (GE AE), General Electric Global Research (GE GR), and Pennsylvania State University Applied Research Laboratory (PSU ARL) under the NASA Aviation Safety Program. This activity supports the overall goal of enhanced civil aviation safety through a reduction in the occurrence of safety-significant propulsion system malfunctions...
Keywords: GAS TURBINE ENGINES; PROPELLER BLADES; WIND TUNNEL TESTS; AUTOROTATION; DRAG; PRESSURE DISTRIBUTION
|NUMERICAL METHODS FOR SOLVING PROBLEMS OF MECHANICS OF CONTINUOUS MEDIA - NON|
NUMERICAL ANALYSIS FOR PROBLEMS OF GAS DYNAMICS
Keywords: AIRCRAFT PERFORMANCE; ARTILLERY; PROJECTILES; PROPELLER DRIVE; AERODYNAMICS; BALLISTICS; HIGH ALTITUDE; HIGH ALTITUDE ENVIRONMENTS
|The Compressible Potential Flow Past Elliptic Symmetrical Cylinders at Zero Angle of Attack and with No Circulation - Hantzsche, W.|
For the tunnel corrections of compressible flows those profiles are of interest for which at least the second approximation of the Janzen-Rayleigh method can be applied in closed form. One such case is presented by certain elliptical symmetrical cylinders located in the center of a tunnel with fixed walls and whose maximum velocity, incompressible, is twice the velocity of flow. In the numerical solution the maximum velocity at the profile and the tunnel wall as well as the entry of sonic veloci...
Keywords: WIND TUNNEL TESTS; AIRCRAFT; PROPELLER BLADES; THRUST LOADS; MACH NUMBER; SLIPSTREAMS
|PROPELLER-NACELLE WHIRL FLUTTER - Houbolt, J. C.|
Whirl flutter in a propeller-nacelle-wing system
Keywords: COMPUTATION; PROPELLER; WING; FLUTTER; NACELLES; PROPELLERS; ROTOR AERODYNAMICS; WINGS; YAW; FLUTTER; NACELLE
|INVESTIGATIONS ON ELASTOHYDRODYNAMICAL LUBRICATION FILM THICKNESS FOR ELLIPTICAL HERTZ CONTACT SURFACES - BRUESER, P|
A NUMERICAL METHOD HAS BEEN DEVELOPED FOR ELLIPTICAL HERTZ CONTACT AREAS WHICH MAKES IT POSSIBLE TO CALCULATE THE PHENOMENA IN THE LUBRICATION GAP. CONSIDERING THE PRESSURE DEPENDENCE OF THE OIL VISCOSITY AND OIL DENSITY, THE SYSTEM OF EQUATIONS WHICH DESCRIBE THE PROBLEM ARE SOLVED TOGETHER. TWO DIFFERENT ITERATION METHODS PROVIDE THE DESIRED RESULTS FOR THE INLET ZONE AND FOR THE HERTZ REGION PROPER...
Keywords: AERODYNAMIC CHARACTERISTICS; PERFORMANCE PREDICTION; PROPELLER BLADES; APPLICATIONS OF MATHEMATICS; MATHEMATICAL MODELS; NUMERICAL ANALYSIS
|Boat Shafts & Propeller Anodes by Zinc Warehouse - Ian Roberts|
Zinc Warehouse, a company offering boat shafts anodes, propeller anodes, collar anodes, bolt, trim-tab, rudder anodes, engine pencil and many others industrial anodes to offer a great resistance to the boats, ships and other industrial equipment against corrosion in salt, brackish and general water. We are offering products manufactured by Sea Shield Marine for more than 25 years.
Keywords: boat shafts anodes; propeller anodes; collar anodes; bolt; trim-tab; rudder anodes; engine pencil
|NACA: university conference on aerodynamics - NON|
No Abstract Available
Keywords: HIGH SPEED; PROPELLERS; WIND TUNNEL TESTS; BLADE TIPS; CAMBER; MACH NUMBER; PROPELLER EFFICIENCY; SWEEPBACK; THICKNESS RATIO
|Ultrafast Directional Beam Switching in Coupled VCSELs - Ning, Cun-Zheng|
We propose a new approach to performing ultrafast directional beam switching using two coupled Vertical-Cavity Surface-Emitting Lasers (VCSELs). The proposed strategy is demonstrated for two VCSELs of 5.6 microns in diameter placed about 1 micron apart from the edges, showing a switching speed of 42 GHz with a maximum far-field angle span of about 10 degrees.
Keywords: SCREWS; FUNCTIONAL DESIGN SPECIFICATIONS; ELLIPTICITY; HELICOPTERS; NOISE REDUCTION; PROPELLER EFFICIENCY; DRAG; ENERGY CONSUMPTION; COMPUTERIZED SIMULATION; PROPELLER BLADES; DESIGN ANALYSIS; EFFICIENCY; TURBOMACHINE BLADES; SHAPE OPTIMIZATION; STRUCTURAL DESIGN; FAN BLADES; ANALYTIC GEOMETRY
|Organic crystal growth experiment facility (13-IML-1) - Kanbayashi, Aki|
The interesting nature of metal-like organic compounds composed of charge transfer complexes has been recently realized. Crystals of these complexes can usually be grown by the solution crystallization method. It is difficult to grow such organic crystals on Earth, especially from the chemical reactions through diffusion controlled process in the solutions, because of gravitational disturbances, or sedimentation...
Keywords: CONTRAROTATING PROPELLERS; EULER EQUATIONS OF MOTION; FLUTTER; LEADING EDGES; OSCILLATING FLOW; PROP-FAN TECHNOLOGY; UNSTEADY AERODYNAMICS; INTERACTIONAL AERODYNAMICS; PROPELLER EFFICIENCY; PROPELLER FANS; ROTATION; UNSTEADY FLOW; ACOUSTIC MEASUREMENT; AEROACOUSTICS; COUNTER ROTATION
|SRB thermal curtain design support - Dixon, Carl A.|
Improvements in SRB Thermal Curtain were identified by thermal design featuring: selection of materials capable of thermal protection and service temperatures by tri-layering quartz, S2 glass, and Kevlar in thinner cross section; weaving in single piece (instead of 24 sections) to achieve improved strength; and weaving to reduce manufacturing cost with angle interlock construction.
Keywords: DUCTED FANS; ACOUSTIC PROPERTIES; CRUISING FLIGHT; DUCTED FAN ENGINES; ENGINE NOISE; MACH NUMBER; ROTOR STATOR INTERACTIONS; STATOR BLADES; VANES; WIND TUNNEL TESTS; INLET AIRFRAME CONFIGURATIONS; NOISE INTENSITY; NOISE MEASUREMENT; PROPELLER BLADES; PROPELLER NOISE; PROPELLERS; SCALE MODELS; SOUND PRESSURE
|Improvements in heat transfer for anti-icing of gas-heated airfoils with internal fins and partitions - Gray, Vernon|
No Abstract Available
Keywords: PROPELLERS - HAMILTON STANDARD FLIGHT TESTS; LOADS - PROPELLERS; PROPELLERS - EFFICIENCY; PROPELLERS, THREE-BLADE; PROPELLERS - CHARACTERISTICS; AIRFOILS - NACA 16-SERIES PROPELLER
|In-flight measurement of the time required for a pilot to respond to an aircraft disturbance - Kuehnel, Helmut A|
No Abstract Available
Keywords: AERODYNAMIC CHARACTERISTICS; AIR FLOW; ANGLE OF ATTACK; PROPELLERS; WIND TUNNEL TESTS; FLOW CHARACTERISTICS; PROPELLER BLADES; V/STOL AIRCRAFT
|NASA Destination Tomorrow - DT12 - First Flight Control - NASA LaRC Office of Education|
NASA Destination Tomorrow Segment explaining how the Wright Brothers successfully achieved controlled flight.
Keywords: NASA Destination Tomorrow; First Flight; Wright Brothers; Controlled Flight; Aircraft Design; Aeronautical Annual; Bicycle; Glider Flight; Scientists; Engineers; Engine; Propeller
|NASA Destination Tomorrow - DT3 - Helicopters - NASA LaRC Office of Education|
NASA Destination Tomorrow Segment describing how helicopters work and the different types of helicopters in use.
Keywords: NASA Destination Tomorrow; Helicopter; Verticale Takeoff; Transport; Civil; Coastguard; Rotorcraft; Fixed Wing; Rotor Blades; Lift; Tail Rotor; Propeller; Thrust
|Propeller Moonlight Snails 50/50 Session - Johnito|
Members of Dutch rockbands Propeller and Moonlight Snails joining forces. Information: http://propellerband.nl http://sundowncircus.net
Keywords: Propeller; Sundown Circus; Moonlight Snails; Franse Bulldog; live; music; rock; Johnito; Michiel Coolen; Sijmen de Geus; Rai Kempees
|Polycrystalline silicon study: Low-cost silicon refining technology prospects and semiconductor-grade polycrystalline silicon availability through 1988 - Costogue, E. N.|
Photovoltaic arrays that convert solar energy into electrical energy can become a cost effective bulk energy generation alternative, provided that an adequate supply of low cost materials is available. One of the key requirements for economic photovoltaic cells is reasonably priced silicon. At present, the photovoltaic industry is dependent upon polycrystalline silicon refined by the Siemens process primarily for integrated circuits, power devices, and discrete semiconductor devices...
Keywords: AIRCRAFT DESIGN; HELICOPTERS; ROTARY WINGS; ROTOR BLADES (TURBOMACHINERY); AERODYNAMIC COEFFICIENTS; AIRCRAFT PERFORMANCE; AIRFOIL PROFILES; PROPELLER BLADES; ROTOR LIFT
|Investigation of Structural Dynamics in a 2-Meter Square Solar Sail Model Including Axial Load Effects - Holland, D. B.|
This paper presents a parameter study of the effect of boom axial loading on the global dynamics of a 2-meter solar sail scale model. The experimental model used is meant for building expertise in finite element analysis and experimental execution, not as a predecessor to any planned flight mission or particular design concept. The results here are to demonstrate the ability to predict and measure structural dynamics and mode shapes in the presence of axial loading.
Keywords: AXIAL FLOW TURBINES; GAS TURBINE ENGINES; INLET PRESSURE; PROPELLER EFFICIENCY; WIND TUNNEL TESTS; TEMPERATURE DISTRIBUTION; PRESSURE DISTRIBUTION
|Advanced Czohcralski ingot growth - Lane, R. L|
A summary of advanced Cz ingot-growth activities is presented. Five ingots (totalling 150 kg) were grown from one crucible by use of chunk silicon replenishment between ingot pulls. The cost of the ingot growth was reduced from 80/kg (conventional Cz growth) to 20/kg. Further improvements can be made by achieving a better understanding of crystalline silicon growth and the influence on growth of contaminants from the atmosphere and/or the crucible...
Keywords: AERODYNAMIC CHARACTERISTICS; WINGS; AIRCRAFT PERFORMANCE; ATTACK AIRCRAFT; WIND TUNNEL TESTS; AIR COOLING; AIRCRAFT LANDING; PROPELLER SLIPSTREAMS; SCALE MODELS; WEAPON SYSTEMS
|Large-scale wind-tunnel tests of a deflected slipstream STOL model with wings of various aspect ratios - Deckert, W. H.|
Wind tunnel determination of longitudinal force characteristics for STOL aircraft scale models with varying wing aspect ratios
Keywords: AIRCRAFT STABILITY; PROPELLER SLIPSTREAMS; SHORT TAKEOFF AIRCRAFT; WIND TUNNEL MODELS; AERODYNAMIC CHARACTERISTICS; LIFT; LONGITUDINAL CONTROL; TRAILING EDGE FLAPS
|Computer Tomography Analysis of Fastrac Composite Thrust Chamber Assemblies - Beshears, Ronald D|
Computed tomography (CT) inspection has been integrated into the production process for NASA's Fastrac composite thrust chamber assemblies (TCAs). CT has been proven to be uniquely qualified to detect the known critical flaw for these nozzles, liner cracks that are adjacent to debonds between the liner and overwrap. CT is also being used as a process monitoring tool through analysis of low density indications in the nozzle overwraps...
Keywords: ACOUSTIC PROPERTIES; HARMONICS; TIP SPEED; ENGINE NOISE; DUCTED FANS; PROPELLER NOISE; AEROACOUSTICS; ROTOR STATOR INTERACTIONS; MICROPHONES; PRESSURE RATIO
|Some principles governing the establishment of meteorological stations along air routes - Aujames,|
The organization of a meteorological service for an air route involves the solution of two distinct problems: distribution and grouping of meteorological stations and communications. Experience gained in the establishment of two lines, Paris-Warsaw and Constantinople-Bucharest enables us to establish certain principles, which may be of interest to note here.
Keywords: PROPELLERS - WIND TUNNEL TESTS; PROPELLERS - HALL WIND TUNNEL TESTS (STANFORD UNIV); PROPELLERS - NAVY WIND TUNNEL TESTS (STANFORD UNIV); PROPELLER, METAL
|The Telecommunications and Data Acquisition Report - NON|
Archival reports on developments in programs managed by the Jet Propulsion Laboratory's (JPL) Office of Telecommunications and Data Acquisition (TDA) are given. Space communications, radio navigation, radio science, and ground-based radio and radar astronomy, activities of the Deep Space Network (DSN) and its associated Ground Communications Facility (GCF) in planning, supporting research and technology, implementation, and operations are reported...
Keywords: NOISE REDUCTION; WAKES; PROPELLER NOISE; PROPELLERS; VANES; WIND TUNNEL TESTS; COUNTER ROTATION; MACH NUMBER; PRESSURE PULSES; VORTICES
|WIND-TUNNEL TESTS OF TWO VTOL PROPELLERS IN DESCENT - Mort, K. W.|
Wind-tunnel tests of two vtol propellers in descent
Keywords: AERODYNAMICS; VTOL AIRCRAFT; WIND TUNNEL; ANGLE OF ATTACK; DESCENT; PROPELLERS; VERTICAL TAKEOFF AIRCRAFT; WIND TUNNEL TESTS; AERODYNAMICS; DESCENT; PROPELLER
|The Crystal Structure at Room Temperature of Six Cast Heat-Resisting Alloys - Rosenbaum, Burt M|
The crystal structures of alloys 61, X-40,X-50, 422-19, 6059, and Vitallium, derived from x-ray diffraction, are discussed. The alloys have been, or are being considered for use in gas turbine applications. The predominant phase was a solid solution of the face centered cubic type of the principal constituent elements.The lattice parameters were found to be between 3.5525 and 3.5662.
Keywords: WIND TUNNEL TESTS; COMPRESSIBILITY EFFECTS; COEFFICIENTS; BLADE TIPS; ROTATING STALLS; PERFORMANCE TESTS; PROPELLER EFFICIENCY; PROPELLERS; PRESSURE MEASUREMENT; THRUST LOADS; WIND TUNNELS; FREE FLOW; MACH NUMBER
|NASA Connect - MTF - Transportation Growth and Patterns - NASA LaRC Office of Education|
NASA Connect segment exploring transportation growth since the early 1900s and how the patterns of this growth are mathematical and are related to the Fibonacci sequence.
Keywords: NASA Connect; Golden Ratio; Fibonacci Sequence; Ratios; Mathematics; Proportions; Airplanes; Wright Brothers; Small Aircraft; Transportation System; Propeller Airplanes; Transportation Growth; Patterns